Area Code 307-477 located in CHEYENNE, LARAMIE, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 477 City : CHEYENNE County : LARAMIE State : WY (Wyoming) NXX Use Type : Wireless NXX Intro Version : 1998-11-20 FIPS (Federal Information Processing Standards) : 56021 LATA (Local Access Transport Area) : 654 Rate Center : CHEYENNE ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 82009 Other Information NPANXX : 307477 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNVWWYXCCM2 MSA CBSA (Core Based Statistical Area) : Cheyenne, WY MSA CBSA Code (Core Based Statistical Area) : 16940 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : UNION TELEPHONE COMPANY OCN (Operating Company Number) : 013B Coverage Area Name : CHEYENNE Latitude : 41.1382 Longitude : -104.8150 ‹ previous : 307-473 next › : 307-477 Telephone Number List 307-477-0000 ~ 307-477-9999